GB631829A - Improvements in or relating to the colouring of oxide-coated aluminium and aluminium alloy articles - Google Patents
Improvements in or relating to the colouring of oxide-coated aluminium and aluminium alloy articlesInfo
- Publication number
- GB631829A GB631829A GB12044/47A GB1204447A GB631829A GB 631829 A GB631829 A GB 631829A GB 12044/47 A GB12044/47 A GB 12044/47A GB 1204447 A GB1204447 A GB 1204447A GB 631829 A GB631829 A GB 631829A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oxalate
- solution
- aluminium
- ferric
- oxide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/04—Anodisation of aluminium or alloys based thereon
- C25D11/18—After-treatment, e.g. pore-sealing
- C25D11/24—Chemical after-treatment
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Abstract
Oxide-coated aluminium or aluminium alloy articles are coloured by immersion in an aqueous solution containing ferric oxalate. The solution may also contain a soluble alkali metal or ammonium oxalate preferably in the proportion of 3 mols to each mol of ferric oxalate. Alternatively the ferric oxalate may be produced in solution by the addition of a soluble oxalate (e.g., potassium oxalate) to a solution of a ferric salt such as the nitrate, chloride or sulphate. The amount of ferric oxalate used in solution may be 3-20 per cent, and preferably 5-10 per cent, and the pH may be 2-7 and preferably 6-6.5, pH adjustment being effected by the addition of, e.g., ammonium hydroxide to the solution. The oxide coating is artificially produced, preferably anodically, and may be obtained by treatment of the aluminium or aluminium alloy with acids such as sulphuric or chromic, alkalis such as sodium carbonate or the alkali sulphate, and acid sulphates such as sodium or sodium acid sulphate; with or without the application of the electric current.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US342707A US2290364A (en) | 1940-06-27 | 1940-06-27 | Surface treatment of aluminum or aluminum alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB631829A true GB631829A (en) | 1949-11-10 |
Family
ID=23342939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12044/47A Expired GB631829A (en) | 1940-06-27 | 1947-05-05 | Improvements in or relating to the colouring of oxide-coated aluminium and aluminium alloy articles |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2290364A (en) |
| GB (1) | GB631829A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2496649A (en) * | 1947-05-06 | 1950-02-07 | Aluminum Co Of America | Treatment of oxide coatings on aluminum |
| US2941282A (en) * | 1955-01-21 | 1960-06-21 | Howard A Fromson | Decorative aluminum product |
| US2785098A (en) * | 1955-01-26 | 1957-03-12 | Horizons Inc | Treating of aluminum and aluminum alloy surfaces |
| US3382160A (en) * | 1960-03-31 | 1968-05-07 | Asada Tahei | Process for inorganically coloring aluminum |
| US3468767A (en) * | 1965-07-12 | 1969-09-23 | Anderson Mfg Co V E | Process of producing permanently colored aluminum |
| HU176794B (en) * | 1978-06-03 | 1981-05-28 | Chinoin Gyogyszer Es Vegyeszet | Process for producing alloy of aluminium of high reducing activity,containing discontinual heterodisperz alloy on the surface |
| US4212685A (en) * | 1978-12-11 | 1980-07-15 | Lea Manufacturing Company | Protective and color receptive coating for aluminum |
-
1940
- 1940-06-27 US US342707A patent/US2290364A/en not_active Expired - Lifetime
-
1947
- 1947-05-05 GB GB12044/47A patent/GB631829A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2290364A (en) | 1942-07-21 |
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